Then God said, “No, but your wife Sarah will bear you a son, and you will call his name Isaac. I will establish My covenant with him as an everlasting covenant and with his descendants after him.
But God said to Abraham, “Do not be upset concerning the boy and your slave wife. Whatever Sarah has said to you, listen to what she says, for in Isaac your descendants will be called.
Then He said, “Take your son, your only son Isaac, whom you love, and go to the land of Moriah, and offer him there as a burnt offering on one of the mountains of which I will tell you.”
Then He gave him the covenant of circumcision. And Abraham became the father of Isaac and circumcised him on the eighth day. And Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.